Contact Information

For mmOpView help and support please use the support ticketing system at


Billing inquiries:

All other inquiries:

Please include a very descriptive subject line for your email so that we may easily differentiate your legitimate inquiry from unsolicited spam.


Mailing Address

MM Controls, Inc.
P.O. Box 86827
Portland, OR 97286-6827


Mike's cell:

(503) 577-7329

Free Modbus Test Server

A Windows application you may use to test Modbus TCP client devices and apps.

HMI for iOS and Android

mmOpView is our HMI system for mobile devices.

mmOpView Support

Support for the mmOpView product is provided through a public forum.